Right now there is no crop that is ideal for builders to farm. All the current crops are priced low because they get easier to farm as you progress in ECC. This means less money for builders.
The reason I propose cactus is because it's a crop that has no specific tool to farm (well, maybe swords are faster, so block swords from breaking cacti), this means it doesn't get more efficient as you get better tools and features. You never have to nerf it. This way builders aren't negatively affected by late-game content.
It is trivial to block the autofarming aspect of cactusfarming (in fact I have the code already written, because I've written a plugin that does exactly that)

Anyway, manual cactus farming is good for builders. Therefore it should be added. This opens up another method of making money for builders. A money method that won't ever get nerfed because of rich players.

tl;dr:
block cactus autofarming
block swords from breaking cacti
This is good for builders.

 

I have, but I don't think I have the timings anywhere. It was well over a year ago. All I know is we had 20 TPS throughout, lol.

EDIT: But I do recall it being less intensive than trails.

 

Well, cactus is the only crop that can be farmed by newer players without special tools. It's a way of making money for new players that is completely unaffected by top-tier tools. (given you disable swords from breaking cactus)

Besides, it was @Nicit6 who wanted a crop for builders.